We chose Trigger for our male rottie.
We had a female named Scarlet who passed in June.
We chose Trigger because he is a family pet yet here to guard his house and family. I always said it was safer to have him than a hand gun because my kids couldn't get in trouble with him. (well like all the horror stories of accidental shootings).
So I wanted the name Rugar and we all debated and chose Trigger. Now everyone says "Trigger like the horse?"